/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * Copyright (C) 2002 Cluster File Systems, Inc. * * This file is part of Lustre, http://www.lustre.org. * * Lustre is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * Lustre is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Lustre; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * */ #ifndef _LUSTRE_NET_H #define _LUSTRE_NET_H #include #include // #include #include #include #include #include /* default rpc ring length */ //#define RPC_RING_LENGTH 10 #define RPC_REQUEST_QUEUE_DEPTH 1024 struct ptlrpc_connection { struct list_head c_link; struct lustre_peer c_peer; __u8 c_local_uuid[37]; /* XXX do we need this? */ __u8 c_remote_uuid[37]; int c_level; __u32 c_generation; /* changes upon new connection */ __u32 c_epoch; /* changes when peer changes */ __u32 c_bootcount; /* peer's boot count */ spinlock_t c_lock; /* also protects req->rq_list */ __u32 c_xid_in; __u32 c_xid_out; atomic_t c_refcount; __u64 c_token; __u64 c_remote_conn; __u64 c_remote_token; __u64 c_last_xid; /* protected by c_lock */ __u64 c_last_committed;/* protected by c_lock */ struct list_head c_delayed_head;/* delayed until post-recovery */ struct list_head c_sending_head;/* protected by c_lock */ struct list_head c_dying_head; /* protected by c_lock */ struct recovd_data c_recovd_data; struct list_head c_imports; struct list_head c_exports; }; struct ptlrpc_client { __u32 cli_request_portal; __u32 cli_reply_portal; __u32 cli_target_devno; void *cli_data; // struct semaphore cli_rpc_sem; /* limits outstanding requests */ char *cli_name; }; /* state flags of requests */ #define PTL_RPC_FL_INTR (1 << 0) #define PTL_RPC_FL_REPLIED (1 << 1) /* reply was received */ #define PTL_RPC_FL_SENT (1 << 2) #define PTL_BULK_FL_SENT (1 << 3) #define PTL_BULK_FL_RCVD (1 << 4) #define PTL_RPC_FL_ERR (1 << 5) #define PTL_RPC_FL_TIMEOUT (1 << 6) #define PTL_RPC_FL_RESEND (1 << 7) #define PTL_RPC_FL_RECOVERY (1 << 8) /* retransmission for recovery */ #define PTL_RPC_FL_FINISHED (1 << 9) #define PTL_RPC_FL_RETAIN (1 << 10) /* retain for replay after reply */ #define PTL_RPC_FL_REPLAY (1 << 11) /* replay upon recovery */ #define PTL_RPC_FL_ALLOCREP (1 << 12) /* reply buffer allocated */ struct ptlrpc_request { int rq_type; /* one of PTL_RPC_MSG_* */ struct list_head rq_list; struct list_head rq_multi; struct obd_device *rq_obd; int rq_status; int rq_flags; __u32 rq_connid; atomic_t rq_refcount; int rq_reqlen; struct lustre_msg *rq_reqmsg; int rq_replen; struct lustre_msg *rq_repmsg; __u64 rq_transno; __u64 rq_xid; char *rq_bulkbuf; int rq_bulklen; int rq_level; time_t rq_time; time_t rq_timeout; // void * rq_reply_handle; wait_queue_head_t rq_wait_for_rep; /* incoming reply */ ptl_md_t rq_reply_md; ptl_handle_md_t rq_reply_md_h; ptl_handle_me_t rq_reply_me_h; /* outgoing req/rep */ ptl_md_t rq_req_md; ptl_handle_md_t rq_req_md_h; struct lustre_peer rq_peer; /* XXX see service.c can this be factored away? */ struct obd_export *rq_export; struct ptlrpc_connection *rq_connection; struct obd_import *rq_import; struct ptlrpc_service *rq_svc; }; struct ptlrpc_bulk_page { struct ptlrpc_bulk_desc *bp_desc; struct list_head bp_link; void *bp_buf; int bp_buflen; struct page *bp_page; __u32 bp_xid; __u32 bp_flags; struct dentry *bp_dentry; int (*bp_cb)(struct ptlrpc_bulk_page *); }; struct ptlrpc_bulk_desc { int bd_flags; struct ptlrpc_connection *bd_connection; struct ptlrpc_client *bd_client; __u32 bd_portal; struct lustre_handle bd_conn; void (*bd_cb)(struct ptlrpc_bulk_desc *, void *); void *bd_cb_data; wait_queue_head_t bd_waitq; struct list_head bd_page_list; __u32 bd_page_count; atomic_t bd_refcount; void *bd_desc_private; struct tq_struct bd_queue; ptl_md_t bd_md; ptl_handle_md_t bd_md_h; ptl_handle_me_t bd_me_h; atomic_t bd_source_callback_count; struct iovec bd_iov[16]; /* self-sized pre-allocated iov */ }; struct ptlrpc_thread { struct list_head t_link; __u32 t_flags; wait_queue_head_t t_ctl_waitq; }; struct ptlrpc_request_buffer_desc { struct ptlrpc_service *rqbd_service; ptl_handle_me_t rqbd_me_h; char *rqbd_buffer; }; struct ptlrpc_service { time_t srv_time; time_t srv_timeout; /* incoming request buffers */ /* FIXME: perhaps a list of EQs, if multiple NIs are used? */ struct ptlrpc_request_buffer_desc *srv_rqbds; /* all the request buffer descriptors */ __u32 srv_buf_size; /* # bytes in a request buffer */ __u32 srv_nbuffs; /* # request buffers */ __u32 srv_req_portal; __u32 srv_rep_portal; __u32 srv_xid; /* event queue */ ptl_handle_eq_t srv_eq_h; struct lustre_peer srv_self; wait_queue_head_t srv_waitq; /* all threads sleep on this */ spinlock_t srv_lock; struct list_head srv_reqs; struct list_head srv_threads; int (*srv_handler)(struct ptlrpc_request *req); char *srv_name; /* only statically allocated strings here; we don't clean them */ }; static inline void ptlrpc_hdl2req(struct ptlrpc_request *req, struct lustre_handle *h) { req->rq_reqmsg->addr = h->addr; req->rq_reqmsg->cookie = h->cookie; } typedef void (*bulk_callback_t)(struct ptlrpc_bulk_desc *, void *); typedef int (*svc_handler_t)(struct ptlrpc_request *req); /* rpc/connection.c */ void ptlrpc_readdress_connection(struct ptlrpc_connection *conn, char *uuid); struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer, char *uuid); int ptlrpc_put_connection(struct ptlrpc_connection *c); struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *); void ptlrpc_init_connection(void); void ptlrpc_cleanup_connection(void); /* rpc/niobuf.c */ int ptlrpc_check_bulk_sent(struct ptlrpc_bulk_desc *bulk); int ptlrpc_check_bulk_received(struct ptlrpc_bulk_desc *bulk); int ptlrpc_send_bulk(struct ptlrpc_bulk_desc *); int ptlrpc_register_bulk(struct ptlrpc_bulk_desc *); int ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *bulk); int ptlrpc_reply(struct ptlrpc_service *svc, struct ptlrpc_request *req); int ptlrpc_error(struct ptlrpc_service *svc, struct ptlrpc_request *req); void ptlrpc_resend_req(struct ptlrpc_request *request); int ptl_send_rpc(struct ptlrpc_request *request); void ptlrpc_link_svc_me(struct ptlrpc_request_buffer_desc *rqbd); /* rpc/client.c */ void ptlrpc_init_client(int req_portal, int rep_portal, char *name, struct ptlrpc_client *); void ptlrpc_cleanup_client(struct obd_import *imp); __u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req); struct ptlrpc_connection *ptlrpc_uuid_to_connection(char *uuid); int ptlrpc_queue_wait(struct ptlrpc_request *req); void ptlrpc_continue_req(struct ptlrpc_request *req); int ptlrpc_replay_req(struct ptlrpc_request *req); void ptlrpc_restart_req(struct ptlrpc_request *req); struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, int opcode, int count, int *lengths, char **bufs); void ptlrpc_free_req(struct ptlrpc_request *request); void ptlrpc_req_finished(struct ptlrpc_request *request); struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *); void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *bulk); struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc); void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *page); int ptlrpc_check_status(struct ptlrpc_request *req, int err); /* rpc/service.c */ struct ptlrpc_service * ptlrpc_init_svc(__u32 bufsize, int nbuffs, int req_portal, int rep_portal, char *uuid, svc_handler_t, char *name); void ptlrpc_stop_all_threads(struct ptlrpc_service *svc); int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc, char *name); int ptlrpc_unregister_service(struct ptlrpc_service *service); struct ptlrpc_svc_data { char *name; struct ptlrpc_service *svc; struct ptlrpc_thread *thread; struct obd_device *dev; }; /* rpc/pack_generic.c */ int lustre_pack_msg(int count, int *lens, char **bufs, int *len, struct lustre_msg **msg); int lustre_msg_size(int count, int *lengths); int lustre_unpack_msg(struct lustre_msg *m, int len); void *lustre_msg_buf(struct lustre_msg *m, int n); static inline void ptlrpc_bulk_decref(struct ptlrpc_bulk_desc *desc) { if (atomic_dec_and_test(&desc->bd_refcount)) { CDEBUG(D_PAGE, "Released last ref on %p, freeing\n", desc); ptlrpc_free_bulk(desc); } else { CDEBUG(D_PAGE, "%p -> %d\n", desc, atomic_read(&desc->bd_refcount)); } } static inline void ptlrpc_bulk_addref(struct ptlrpc_bulk_desc *desc) { atomic_inc(&desc->bd_refcount); CDEBUG(D_PAGE, "Set refcount of %p to %d\n", desc, atomic_read(&desc->bd_refcount)); } #endif